Cat exerciser



FIG. 1 is a perspective view of a cat exerciser showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof, the right side being the same as the side shown;

FIG. 4 is a front elevational view thereof, the rear being the same as the front shown; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a cat exerciser, as shown and described. 